Plaster board



April 3, 192s. 1,664,837

J. STRAND PLASTER BOARD Filed June 25. 1924 www Patented Apr. 3, 1928.

UNITED STATES PATENT OFFICE.

JOSEPH STRAND, OF LOS ANGELES, CALIFORNIA, ASSIGNOB TO KLINCH LATH COB-PORATION,

A CORPORATION OF CALIFORNIA.

'BLASTER BOARD.

Application led June 25,

My present invention is referred to as a strand-key plaster board forthe reason that external strands of Wire, or the like, are 1ntended tobe used, as by securing them to 5 one or both of the faces of plasterboard, in the keying of a coat or coats, such as a finishing coat or aprotective coat, thereto; and, in a preferred embodiment of myinvention, the mentioned strands may serve not only in the keying oranchoring of the mentioned coat or coats, but also in the externalreinforcement of the plaster board and in the connecting of lasterboards to one another, or to any foun ation or support therefor, suchas, for example, the studs of a wall.

Other objects of my invention will appear from the following descriptionof an advantageous embodiment thereof, taken in connection with theappended claims and the accompanying drawings, in which Fig. 1 is aperspective view of one corner of a plaster board illustrating myinvention.

Fig. 2 is a sectional view on an enlarged scale, this view bein taken ina plane such as is indicated by t e line 2-2 of Fig. 1 and a coatingbeing shown as applied to said plaster board.

Referring to the details of that specific embodiment of my inventionchosen for puroses of illustration, 11 may be a substantially flat bodyformed of lastic material of an usual or preferred c aracter andprovided with a layer or 'layers of fibrous matei rial, such as thesheets 12, 12' of a suitable aper, one or both surfaces of any suitableEcard being preferably provided with integral keying means such as theslots 13, 13', shown as arranged with their longitudinal 0 axesextending in two directions substantially at ri ht angles to one anotherand parallel wit the edges of a substantially rectangular slab ofplaster board.

It will be understood that slots of the 5 character shown, or of anyreferred character, although serving a usefiil purpose in the keying ofan additional coat or coats to a plaster board, are liable appreciablyto weaken the same. To offset, or to more than if- 5 set this weakening,and to aid in the keying of a coator coats to a plaster board,accordingly provide, on one or both surfaces of my novel plaster board,strands of a reinforcing material such as wire; and these 1924. semiiva. 722,265.

strands are preferably arranged transversel and centrally of therespective slots, regar less of the depth and configuration of the same,in such manner as to assure the secure retention of the key projectionsextending from any coat applied thereto. For example, I may employ onlystrands such as the wires 14, shown as extending in a horizontaldirection across the slots 13, and preferably provided with freeprojecting ends 15; or I may substitute therefor or associate therewithstrands 16, having projecting ends 17, and extending across the slots13. If the circumstances of use are deemed to justify unusualprecautions with a view to adequate reinforcement or keying with acoating, I may optionally employ additional strands, extending in anydesired direction, such as the strands 18, having the free ends 19,these strands being shown as intersecting the strands 14 above each ofthe slots 13. Instead of employing straight strands, I may optionallyform any desired loops therein, the points of depression between suchloops being shown as secured by suitable means, such as staples 20,shown as extending through both of the fibrous layers 12, 12' and asclinched beneath the lower fibrous layer in such manner as to permit anoptional paintin or papering directly thereon, as may be esired in, forexample, the rlzplpstruction of inexpensive cabins, or the The free ends15z 17, or 19, when such ends are rovided, pro]ecting beyond the ed esof t e slab proper, may be used in t e connecting of one slab toanother, and in the securing of slabs to studs or other supportinmembers as best shown in Fig. 2 in which the use of long staples 21instead of or together with ordinary nails 22 is suggested.

Although I have herein described one complete embodiment of myinvention, it will be understood that various features thereof might beindependently employed and also that various modifications might be madeby those skilled in the art, without the slightest departure from thespirit and scope of my invention, as the same is indicated above and. inthe following claims.

I claim as my invention:

1. A plaster board provided with longitudinal and transverse keyingslots having sides substantial] at right angles to the surface of saidboar and a plurality of laster reinforcing Wires secured to the si esof, and entirely outside of, said plaster board, and arrangedcriss-cross over a portion of said slots.

2. A plaster board comprising: a slab having slots with sidessubstantially at right angles to the surface of said slab; and plasterretainin means comprisin strands of wire secure to a face of Sai plasterboard and extending across said slots, said wires en aging the surfaceof the plaster board only at points Where secured thereto.

3. A plaster board comprising: a slab having slots with sidessubstantially at right angles to the surface of said slab; and plasterretaining means comprising strands of wire secured to a face of saidplaster board, said strands extending in a plurality of directions andengaging the surface of the plaster board only at points where securedthereto.

4. A plaster board comprising: a slab composed of fibrous layers andhaving slots adapted to cooperate 1n the retention o f a coating appliedthereto; and cooperating coating retaining means comprising metallicstrands secured to a face of said plaster board extending in a pluralityof directions across said slots to aid in the retention of keyprojections therein, said strands engaging said plaster board onlyadjacent points where secured thereto.

5. A plaster board` comprising: a slab composed of fibrous layers andhaving slots adapted to cooperate in the retention of a coating appliedthereto; cooperating coating retaining means comprising metallic strandssecured to a face of said plaster board extending in a plurality ofdirections across said slots to aid in the retention of key projectionstherein, said strands engaging said plaster board only adjacent pointsWhere secured thereto; and staple securing means for securing saidstrands to said plaster board.

6. A plaster board comprising: a slab formed of a cementitious substancecompressed between sheets of fibrous material, said slab having aplurality of elon ated depressions in one face thereof, sai depressionsextending some parallel to and some at right angles to the edge of saidslab; a plurality of wire strands secured to the face of said slab andbridging said depressions, whereby plaster, when applied, will ll saiddepressions and entirely enclose said strands at all points thereof,except where said wires are secured to said slab.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 12th day of June, 1924.

JOSEPH STRAND.

CERTIFICATE OF CORRECTION.

Patent No. l, 664,837.

Granted April 3, 192s, to

JOSEPH STRAND.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 54, claim 6, following the semi-colon after the word "slab" insertthe words "plaster retaining means comprieing"; and that the saidLetters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of May, A. D. 1928.

(Seal) M. J. Moore. Acting Commissioner of Patents.

sides substantial] at right angles to the surface of said boar and aplurality of laster reinforcing Wires secured to the si es of, andentirely outside of, said plaster board, and arranged criss-cross over aportion of said slots.

2. A plaster board comprising: a slab having slots with sidessubstantially at right angles to the surface of said slab; and plasterretainin means comprisin strands of wire secure to a face of Sai plasterboard and extending across said slots, said wires en aging the surfaceof the plaster board only at points Where secured thereto.

3. A plaster board comprising: a slab having slots with sidessubstantially at right angles to the surface of said slab; and plasterretaining means comprising strands of wire secured to a face of saidplaster board, said strands extending in a plurality of directions andengaging the surface of the plaster board only at points where securedthereto.

4. A plaster board comprising: a slab composed of fibrous layers andhaving slots adapted to cooperate 1n the retention o f a coating appliedthereto; and cooperating coating retaining means comprising metallicstrands secured to a face of said plaster board extending in a pluralityof directions across said slots to aid in the retention of keyprojections therein, said strands engaging said plaster board onlyadjacent points where secured thereto.

5. A plaster board` comprising: a slab composed of fibrous layers andhaving slots adapted to cooperate in the retention of a coating appliedthereto; cooperating coating retaining means comprising metallic strandssecured to a face of said plaster board extending in a plurality ofdirections across said slots to aid in the retention of key projectionstherein, said strands engaging said plaster board only adjacent pointsWhere secured thereto; and staple securing means for securing saidstrands to said plaster board.

6. A plaster board comprising: a slab formed of a cementitious substancecompressed between sheets of fibrous material, said slab having aplurality of elon ated depressions in one face thereof, sai depressionsextending some parallel to and some at right angles to the edge of saidslab; a plurality of wire strands secured to the face of said slab andbridging said depressions, whereby plaster, when applied, will ll saiddepressions and entirely enclose said strands at all points thereof,except where said wires are secured to said slab.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 12th day of June, 1924.

JOSEPH STRAND.

CERTIFICATE OF CORRECTION.

Patent No. l, 664,837.

Granted April 3, 192s, to

JOSEPH STRAND.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 2,line 54, claim 6, following the semi-colon after the word "slab" insertthe words "plaster retaining means comprieing"; and that the saidLetters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of May, A. D. 1928.

(Seal) M. J. Moore. Acting Commissioner of Patents.

